You can definitely do more than just squat - just not a ton more. Keep deadlifting/pulling relatively light and infrequent, but go ahead and press/push press as much as you want. If you're doing the oly lifts, best to keep them 60-70% or so for singles and doubles. Take the time to do a lot of light technique work. The program works very well - as long as you're allowing yourself to recover adequately.